He is being true.

He sits alone in his tiny room,
staring through the bars to the big bright moon,
thinking of times when he was free,
when now he is scared that freedom is something he'll never see,
he tries each day to prove his innocence,
but the world seems against him and think it is all a pretence,
they think he is guilty,
and now he sits fearing the death penalty,
serving time for something he didnt do,
not knowing what will happen, wishing that they knew,
that he is not lying, he is being true.